SYNTHESIS OF PRECURSORS FOR NEW PYRIMIDINE ACYCLO-<i>C</i>-NUCLEOSIDE ANALOGUES BY RING TRANSFORMATION OF 2-FORMYLGALACTAL <sup>*,†</sup>
作者:Alina Montero、Holger Feist、Manfred Michalik、José Quincoces、Klaus Peseke
DOI:10.1081/car-120013499
日期:2002.9.23
5-(1,2,4-tri-O-benzyl-d-lyxo-1,2,3,4-tetrahydroxybutyl)pyrimidines 2–4. Treatment of 1 with 2-aminobenzimidazole and 3-amino-1,2,4-triazole, respectively, afforded 3-(1,2,4-tri-O-benzyl-d-lyxo-1,2,3,4-tetrahydroxybutyl)benzo[4,5]imidazo[1,2-a]pyrimidine (5) and 6-(1,2,4-tri-O-benzyl-d-lyxo-1,2,3,4-tetrahydroxybutyl)-[1,2,4]triazolo[1,5-a]pyrimidine (6).
2- formylgalactal反应1,呈现为与推挽官能的不饱和糖衍生物与胍和脒鎓盐,分别在碱性条件下进行,得到的取代的5-(1,2,4-三- ø -苄基d - L-来苏-1,2,3,4-四羟基丁基)嘧啶2 - 4。分别用2-氨基苯并咪唑和3-氨基-1,2,4-三唑处理1,得到3-(1,2,4-三-O-苄基-d - lyxo -1,2,3,4-四羟基丁基)苯并[4,5]咪唑并[1,2- a ]嘧啶(5)和6-(1,2,4-tri- O-苄基-d - lyxo -1,2,3,4-四羟基丁基)-[1,2,4]三唑并[1,5- a ]嘧啶(6)。